4 Introduction 



In Europe, Fieber, Scott, Edwards, Sahlberg, Buckton, Melichar, 

 Oshanin and others described and catalogued various genera and species of 

 this family. In the Americas, there have been numerous papers by Ball, 

 Berg, Blanchard, Uhler, Van Duzee, Fowler, Metcalf, Dozier and others. 



The species and genera from the other parts of the world have been 

 studied and described by White, Atkinson, Kirby, Melichar, Matsumura, 

 Kirkaldy, Hutton, Distant, Jacobi, E. Schmidt, Schumacher, Bergevin, 

 Haupt, Osborn, Muir, Myers, Lallemand, Hesse, and Kusnezov. 



GEOGRAPHICAL DISTRIBUTION 



The 786 species of this family are widely distributed in all regions of 

 the world save the extreme Arctic and Antarctic regions. The faunas of 

 Europe, North America, Central America, Hawaiian Islands, Japan, India 

 and New Zealand are fairly well known, but vast regions of the world have 

 hardly been explored. 



FORM OF THE PRESENT CATALOGUE 



This catalogue follows the general form of the present series. The family 

 is divided into tribes, and the genera are arranged under the tribes in as 

 near a phylogenetic order as our present knowledge will permit. The species 

 are arranged under the genera in an alphabetic sequence. All references have 

 been checked against the original save those marked with an asterisk (*), 

 which have been accepted from reliable sources. Every effort has been made 

 to have the references full and complete and to give an indication of the 

 character of the data contained. Where reprints have been published with 

 different pages these pages are inserted in parenthesis following the pages of 

 the original. In a few cases where the matter has been reprinted under a 

 different title with different pages separate references are given. Where 

 authentic editions have been published these have been indicated by sepa- 

 rate references. Genera established without included species have been 

 dated from their original description with their type fixation from the date 

 of the first included species. Original spellings have been retained in all 

 cases, except obvious typographical errors; and the original termination of 

 specific names has been retained regardless of the termination of the generic 

 name under which the species is at present located. The species have also 

 been listed under every known combination so that it is possible to find 

 any species without recourse to the index which will be published at the 

 completion of the fascicle, together with the full bibliography. 



A catalogue is not a revision of a group and the location of the genera 

 and species in the present catalogue is merely an attempt to reflect what is 

 believed to be the general consensus of the best authorities at the present 

 time. Doubtful genera and species have been included to call them to the 

 attention of subsequent revisers. Z. P. Metcalf 



Raleigh, North Carolina 

 July, 1934. 



